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Send input from Dialog Fragment to ProfileFragment

I know there are similar questions but I couldn't find an answer to solve my problem.
I have a DialogUpdateEmail which I want to be opened from ProfileFragment. In the dialog I want to enter my new email and send it to my ProfileFragment in order to change it also in the database.
ProfileFragment.java :
import androidx.fragment.app.Fragment;
public class ProfileFragment extends Fragment implements SendInputEmail {
public static final int PROFILE_FRAGMENT = 1;
private static final String TAG = "ProfileFragment";
private TextView TVHello, TVUsernameMessage, TVusernameinfo, TVemailinfo, TVbirthdate;
public void sendInput(String input) {
Log.d(TAG, "sendInput: found incoming input: " + input);
TVemailinfo.setText(input);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_profile, container, false);
Button Bsignout = (Button) v.findViewById(R.id.signoutbutton);
Button Beditusername = (Button) v.findViewById(R.id.editusernamebutton);
Button Beditemail = (Button) v.findViewById(R.id.editemailbutton);
Beditemail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "onClick: opening email dialog");
DialogUpdateEmail dialog = new DialogUpdateEmail();
dialog.setTargetFragment(ProfileFragment.this,PROFILE_FRAGMENT);
dialog.show(getActivity().getFragmentManager(), "DialogUpdateEmail");
}
});
return v;
}
DialogUpdateEmail.java :
public class DialogUpdateEmail extends DialogFragment implements SendInputEmail {
private static final String TAG = "DialogUpdateEmail";
SendInputEmail mHost = (SendInputEmail)getTargetFragment();
public View onCreateView(final LayoutInflater inflater, #Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.popup, container, false);
EditText UpdateEmail = (EditText) view.findViewById(R.id.emailinfoupdate);
Button Beditemail = (Button) view.findViewById(R.id.updatesavebutton);
Button Bcancelemail = (Button) view.findViewById(R.id.updatecancelbutton);
Beditemail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "onClick: capturing input.");
String input = UpdateEmail.getText().toString();
Log.d(TAG, "input : "+input);
mHost.sendInput(input);
getDialog().dismiss();
}
});
return view ;
}
public void onAttach(Context context) {
super.onAttach(context);
try{
mHost = (SendInputEmail) getTargetFragment();
}catch (ClassCastException e){
Log.e(TAG, "onAttach: ClassCastException : " + e.getMessage() );
}
}
#Override
public void sendInput(String input) {
}
}
SendInputEmail Interface :
public interface SendInputEmail {
void sendInput(String input);
}
My problem is that I have an error when I try to use setTargetFragment in ProfileFragment. It says that Profile Fragment is not a Fragment, I really don't know why.

From doc in here :
public class DialogUpdateEmail extends DialogFragment {
private DialogEditListener listener;
#NonNull
#Override
public Dialog onCreateDialog(#Nullable Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
// Get the layout inflater
LayoutInflater inflater = requireActivity().getLayoutInflater();
// Inflate and set the layout for the dialog
// Pass null as the parent view because its going in the dialog layout
View view = inflater.inflate(R.layout.popup, null);
builder.setView(view);
EditText UpdateEmail = (EditText) view.findViewById(R.id.emailinfoupdate);
Button Beditemail = (Button) view.findViewById(R.id.updatesavebutton);
Button Bcancelemail = (Button) view.findViewById(R.id.updatecancelbutton);
Beditemail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (listener != null) {
listener.onDialogEditClick(UpdateEmail.getText().toString());
DialogUpdateEmail.this.getDialog().dismiss();
}
}
});
Bcancelemail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DialogUpdateEmail.this.getDialog().cancel();
}
});
return builder.create();
}
public interface DialogEditListener {
void onDialogEditClick(String email);
}
public void setListener(DialogEditListener listener) {
this.listener = listener;
}
}
We send the email from the dialog to the fragment using the observer/listener pattern.
And in your ProfileFragment just implement DialogEditListener and subscribe it to listen for click button in the dialog like so:
public class ProfileFragment extends Fragment
implements SendInputEmail, DialogUpdateEmail.DialogEditListener {
public static final int PROFILE_FRAGMENT = 1;
private static final String TAG = "ProfileFragment";
private TextView TVHello, TVUsernameMessage, TVusernameinfo, TVemailinfo, TVbirthdate;
public void sendInput(String input) {
Log.d(TAG, "sendInput: found incoming input: " + input);
TVemailinfo.setText(input);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_profile, container, false);
Button Bsignout = (Button) v.findViewById(R.id.signoutbutton);
Button Beditusername = (Button) v.findViewById(R.id.editusernamebutton);
Button Beditemail = (Button) v.findViewById(R.id.editemailbutton);
Beditemail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "onClick: opening email dialog");
//show your dialog
DialogUpdateEmail dialogUpdateEmail = new DialogUpdateEmail();
dialogUpdateEmail.setListener(ProfileFragment.this);
dialogUpdateEmail.show(getActivity().getSupportFragmentManager(), "DialogUpdateEmail");
}
});
return v;
}
#Override
public void onDialogEditClick(String email) {
//use your email here
Toast.makeText(getContext(), "My email: " + email, Toast.LENGTH_SHORT).show();
}
}

Firebase create a new object every time I click a button

I have a problem/ question. I want to save different objects to firebase realtime database every time I click a button, but I have a problem because, since I have a Shopping list I click more items and I want to save them to the database but it saves just the last item I clicked and I want to understand what I'm doing wrong. I'm new to Android / Firebase, it's the first time I'm doing it so if anyone can tell me what I'm doing wrong it would be awesome. Thank you so much. I will attach the code and the photo of the database.
Activity :
public class FirebaseSearch extends AppCompatActivity {
private EditText mSearchField;
private ImageButton mSearchBtn;
private ImageButton AddToCart;
private ImageButton Cart;
int position=0;
String searchText="";
private RecyclerView mResultList;
private DatabaseReference mUserDatabase;
public static int cart_count = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_firebasesearch);
mUserDatabase = FirebaseDatabase.getInstance().getReference("Users");
mSearchField = findViewById(R.id.search_field);
mSearchBtn = findViewById(R.id.search_btn);
mResultList = findViewById(R.id.result_list_cart);
AddToCart = findViewById(R.id.imageButton2);
Cart = findViewById(R.id.cartButton);
mResultList.setHasFixedSize(true);
mResultList.setLayoutManager(new LinearLayoutManager(this));
mSearchBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
searchText = mSearchField.getText().toString();
firebaseUserSearch(searchText);
}
});
Cart.setOnClickListener(new View.OnClickListener() {
private Object Tag="Activity";
#Override
public void onClick(View v) {
if (cart_count < 1) {
} else {
startActivity(new Intent(FirebaseSearch.this, CartActivity.class));
}
}
});
}
private void firebaseUserSearch(String searchText) {
Toast.makeText(FirebaseSearch.this, "Started Search", Toast.LENGTH_LONG).show();
Query firebaseSearchQuery = mUserDatabase.orderByChild("Name").startAt(searchText).endAt(searchText + "\uf8ff");
FirebaseRecyclerAdapter<Users, UsersViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Users, UsersViewHolder>(
Users.class,
R.layout.list_layout,
UsersViewHolder.class,
firebaseSearchQuery
) {
#Override
protected void populateViewHolder(UsersViewHolder viewHolder, Users model, int position) {
viewHolder.getDetails(model.getName(), model.getSurname(),model.getPrice());
viewHolder.setDetails(model.getName(), model.getSurname(),model.getPrice());
}
};
mResultList.setAdapter(firebaseRecyclerAdapter);
}
#Override
protected void onStart() {
super.onStart();
invalidateOptionsMenu();
}
// View Holder Class
public static class UsersViewHolder extends RecyclerView.ViewHolder {
View mView;
String nome;
String surname;
Long prezzo;
public UsersViewHolder(View itemView) {
super(itemView);
mView = itemView;
ImageButton addToCart = (ImageButton)mView.findViewById(R.id.imageButton2);
addToCart.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Users a = new Users(nome,surname,prezzo);
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference myRef = database.getReference("Cart");
myRef.setValue(a);
}
});
}
public void getDetails(String name,String cognome,Long price){
nome=name;
surname=cognome;
prezzo=price;
}
public void setDetails(String name, String surname, Long price) {
TextView user_name = (TextView) mView.findViewById(R.id.name_text);
TextView user_surname = (TextView)mView.findViewById(R.id.status_text);
TextView user_price = (TextView)mView.findViewById(R.id.price);
user_name.setText(name);
user_surname.setText(surname);
user_price.setText(Long.toString(price));
}
}
}
enter code here

You need to use the push() method:
myRef.push().setValue(a);
Currently the last data you are adding is overriding the data before it. The push() method will create a random ID and separate each user.
Or if you are using firebase authentication then you can use the user uid instead of push() to separate each user that you are saving.

Can't convert object of type java.lang.String to type (Firebase,RecyclerView)

I got two RecyclerView on the same page at this moments which are Breakfast and Lunch RecyclerView but I am facing the following error Can't convert object of type java.lang.String to type com.example
It highlights this line
userRecordslist.add(ds.getValue(UserRecordsModel.class));
I have tried several ways.
but when I used this code , the data from different record was displayed in the Breakfast RecyclerView
myRef = FirebaseDatabase.getInstance().
getReference("UsersRecords").child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.child(date_record);
these are the screenshots of my Firebase and my App. You can see both data from different record is displayed on the same RecyclerView.
and later I tried to use this "new" code for database reference, the data that was supposedly retrieved from Firebase was NOT be displayed on the Breakfast Recycler View and I got the Can't convert object of type java.lang.String to type error
myRef = FirebaseDatabase.getInstance().
getReference("UsersRecords").child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.child(date_record).child("BreakfastRecord");
I want to fetch the data and display it in the "suppose" RecyclerView. Please help out.
This code for my PlanMeal activity:
//BUTTON
Button backBtn;
Button addMealBreakBtn;
Button addMealLunchBtn;
Button addMealDinnerBtn;
//DATABASE
FirebaseAuth mAuth;
FirebaseUser currentUser;
DatabaseReference userRecordRef, myRef,requiredCalorieRef, mylunchRef;
//TEXT VIEW
TextView userRequiredCalorie;
ArrayList<UserRecordsModel> userRecordslist;
RecyclerView recyclerView, recyclerViewlunch;
private RecyclerView.Adapter userRecordHolder;
//DATE
String date_record ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_plan_meal_user);
date_record = new SimpleDateFormat("yyMMdd", Locale.getDefault()).format(new Date());
//create a date string.
String date_n = new SimpleDateFormat("MMM dd, yyyy", Locale.getDefault()).format(new Date());
//get hold of textview.
TextView date = (TextView) findViewById(R.id.datePlanMeal);
//set it as current date.
date.setText(date_n);
//INI VIEWS
userRequiredCalorie= (TextView) findViewById(R.id.outputPlanMealCalorie);
//FIREBASE AUTH
mAuth = FirebaseAuth.getInstance();
currentUser=mAuth.getCurrentUser();
//DATABASE REFERENCE
myRef = FirebaseDatabase.getInstance().
getReference("UsersRecords").child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.child(date_record);
/*mylunchRef=FirebaseDatabase.getInstance().
getReference("UsersRecords").child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.child(date_record).child("LunchRecord");*/
//myRef = FirebaseDatabase.getInstance().getReference("UsersRecords").child(FirebaseAuth.getInstance().getCurrentUser().getUid());
//mylunchRef = FirebaseDatabase.getInstance().getReference("UsersRecords").child(FirebaseAuth.getInstance().getCurrentUser().getUid());
//RECYCLER VIEW
//*********BREAKFAST******************************************//
recyclerView = findViewById(R.id.userRecordRecylerView);
LinearLayoutManager manager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(manager);
recyclerView.setHasFixedSize(true);
//ADAPTER
userRecordslist = new ArrayList<>();
userRecordHolder = new UserRecordsHolder(userRecordslist);
recyclerView.setAdapter(userRecordHolder);
//*********LUNCH******************************************//
recyclerViewlunch = findViewById(R.id.userRecordRecylerViewLunch);
LinearLayoutManager manager1 = new LinearLayoutManager(this);
recyclerViewlunch.setLayoutManager(manager1);
recyclerViewlunch.setHasFixedSize(true);
//ADAPTER
userRecordslist = new ArrayList<>();
userRecordHolder = new UserRecordsHolder(userRecordslist);
recyclerViewlunch.setAdapter(userRecordHolder);
//BUTTON
addMealBreakBtn = (Button) findViewById(R.id.addMealBreakBtn);
backBtn = (Button)findViewById(R.id.backBtnPlan) ;
//**********************DATABASE REFERENCE FOR USER REQUIRED CALORIE***************************//
requiredCalorieRef = FirebaseDatabase.getInstance().getReference("Users").child(FirebaseAuth.getInstance().getCurrentUser().getUid());
requiredCalorieRef.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
String userCalorieSuggestion = String.valueOf((dataSnapshot.child("daily calorie").getValue()));
userRequiredCalorie.setText((userCalorieSuggestion +"kcal"));
/*String userCalorieSuggestion = Double.toString((Double) dataSnapshot.child("daily calorie").getValue());
showDailyCalorie.setText(("Daily Calorie Suggestion: " + userCalorieSuggestion +"kcal"));*/
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
//BACK BUTTON*************************************************
backBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent signIn = new Intent(PlanMealUser.this,HomepageUser.class);
startActivity(signIn);
}
});
//ADD MEAL BUTTONS**********************************************
addMealBreakBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent breakfast = new Intent(PlanMealUser.this,ViewProduct.class);
startActivity(breakfast);
}
});
addMealLunchBtn = (Button) findViewById(R.id.addMealLunchBtn);
addMealLunchBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent signIn = new Intent(PlanMealUser.this,ViewProduct_Lunch.class);
startActivity(signIn);
}
});
addMealDinnerBtn = (Button) findViewById(R.id.addMealDinnerBtn);
addMealDinnerBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent signIn = new Intent(PlanMealUser.this,ViewProduct.class);
startActivity(signIn);
}
});
}
#Override
protected void onStart() {
super.onStart();
if (myRef != null) {
myRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
userRecordslist = new ArrayList<>();
for (DataSnapshot ds : dataSnapshot.getChildren()) {
userRecordslist.add(ds.getValue(UserRecordsModel.class));
}
UserRecordsHolder userRecordHolder = new UserRecordsHolder(userRecordslist);
recyclerView.setAdapter(userRecordHolder);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
Toast.makeText(PlanMealUser.this, databaseError.getMessage(),
Toast.LENGTH_SHORT).show();
}
});
}
}
}
This is my Model :
package com.example.buddymealplanneruser.Child.UserRecords;
public class UserRecordsModel {
private String foodName;
private String foodCalorie;
//constructor
public UserRecordsModel (String foodName,
String foodCalorie
)
{
this.foodName = foodName;
this.foodCalorie = foodCalorie;
}
public UserRecordsModel(){
}
//Getter and Setter
public String getFoodName() {
return foodName;
}
public void setFoodName(String foodName) {
this.foodName = foodName;
}
public String getFoodCalorie() {
return foodCalorie;
}
public void setFoodCalorie(String foodCalorie) {
this.foodCalorie = foodCalorie;
}
}
This is my Adapter
public class UserRecordsHolder extends RecyclerView.Adapter<UserRecordsHolder.MyURHolder> {
Context context;
ArrayList<UserRecordsModel> userRecordslist;
public UserRecordsHolder (ArrayList<UserRecordsModel> userRecordslist)
{
this.userRecordslist=userRecordslist;
}
#NonNull
#Override
public MyURHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row_user_records, viewGroup,false);
return new MyURHolder(view);
}
#Override
public void onBindViewHolder(#NonNull MyURHolder myURHolder, int i) {
myURHolder.foodName.setText(userRecordslist.get(i).getFoodName());
myURHolder.foodCalorie.setText(userRecordslist.get(i).getFoodCalorie());
}
#Override
public int getItemCount()
{
return userRecordslist.size();
}
class MyURHolder extends RecyclerView.ViewHolder
{
TextView foodName, foodCalorie;
public MyURHolder (#NonNull View itemView){
super(itemView);
foodName = itemView.findViewById(R.id.userRecordsFName);
foodCalorie = itemView.findViewById(R.id.userRecordsKcal);
}
}
}
Hope someone can help.

You'll need one more level beneath BreakfastRecord or LunchRecord:
UserRecords
UID
Date
BreakfastRecord
1
foodCalorie
foodName
2
foodCalorie
foodName
3
foodCalorie
foodName

How to Delete the Firebase database Key from Recycle view based on position

I'm building an app as college project for Blood Donation where user can register using Firebase authentication Email and Password and can post request for Blood which is then added to Firebase DataBase which is shown in Recycle view inside an app
I'was able to complete that part.
Now I want to add button which will be visible in the recycle view with option to delete the request if He wish in case he received call from donor or if he no longer in need. But this button should only be visible to user who has posted for request and will remain hidden for other help post inside recycle adapter.
and when he click the button it should delete the particular Data from Firebase Database also.
To summarize.
1. I need button visible only to user who has posted the help request which will delete the post if he wish to
On click event of that Button, will also delete the particular post from Firebase Database
I'm using Firebase authentication sing in of Email and Password.
Here is the Firebase Database Structure
Here is the Code where user wants to upload the Help request and is added
to firebase Data as well
public class EnquiryActivity extends AppCompatActivity {
//UI
Button btnRequest;
EditText edtName,edtBlood,edtPlace,edtMobile,edtEmail;
//DB
DatabaseReference mHelper;
FirebaseAuth mAuth;
//progress
ProgressDialog mProgress;
#Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_enquiry);
//initialisation
edtBlood=(EditText)findViewById(R.id.enq_blood);
edtMobile=(EditText)findViewById(R.id.enq_mobile);
edtEmail=(EditText)findViewById(R.id.enq_email);
edtName=(EditText)findViewById(R.id.enq_name);
edtPlace=(EditText)findViewById(R.id.enq_place);
btnRequest=(Button)findViewById(R.id.button2);
//firebase
mHelper= FirebaseDatabase.getInstance().getReference();
final String mCurrentUser=FirebaseAuth.getInstance().getCurrentUser().getUid().toString();
mAuth=FirebaseAuth.getInstance();
//progress
mProgress=new ProgressDialog(this);
mProgress.setTitle("Loading");
mProgress.setMessage("Please wait..");
btnRequest.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mProgress.show();
String blood=edtBlood.getText().toString();
String name=edtName.getText().toString();
String mobile=edtMobile.getText().toString();
String email=edtMobile.getText().toString();
String place=edtPlace.getText().toString();
String temp=blood.toUpperCase();
if(!TextUtils.isEmpty(blood)||!TextUtils.isEmpty(name)||!TextUtils.isEmpty(mobile)||
!TextUtils.isEmpty(place)){
HashMap<String, String> userMap = new HashMap<>();
userMap.put("name", name);
userMap.put("blood_group","Blood Group:- " + blood);
userMap.put("email", email);
userMap.put("mobile", mobile);
userMap.put("place","Location:- " + place);
mHelper.child("Help").child(mCurrentUser).setValue(userMap).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
mProgress.dismiss();
Toast.makeText(getApplicationContext(), "Registered Successfully..!", Toast.LENGTH_LONG).show();
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
});
}else{
Toast.makeText(getApplicationContext(),"Please enter the details in all fields",Toast.LENGTH_LONG).show();
}
}
});
}
}
Here is the Code where list of help post is show including user who has posted of his/her own
* A simple {#link Fragment} subclass.
*/
public class NeedHelpFragment extends Fragment {
FloatingActionButton floatingActionButton;
private View mMainView;
private RecyclerView mHelpList;
private DatabaseReference mUsersDatabase;
private DatabaseReference mUsers;
private FirebaseAuth mAuth;
private String mCurrent_user_id;
public NeedHelpFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mMainView = inflater.inflate(R.layout.fragment_need_help, container, false);
floatingActionButton = (FloatingActionButton) mMainView.findViewById(R.id.float_add);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(getActivity(), EnquiryActivity.class));
}
});
//init
mHelpList = (RecyclerView) mMainView.findViewById(R.id.need_recyclerview);
mAuth = FirebaseAuth.getInstance();
mUsersDatabase = FirebaseDatabase.getInstance().getReference().child("Help");
mUsers = FirebaseDatabase.getInstance().getReference().child("Users");
mCurrent_user_id = mAuth.getCurrentUser().getUid();
//
mHelpList.setHasFixedSize(true);
LinearLayoutManager linearVertical = new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
mHelpList.setLayoutManager(linearVertical);
DividerItemDecoration mDividerItemDecoration = new DividerItemDecoration(
mHelpList.getContext(),
linearVertical.getOrientation()
);
mHelpList.addItemDecoration(mDividerItemDecoration);
return mMainView;
}
#Override
public void onStart() {
super.onStart();
FirebaseRecyclerAdapter<Help, HelpViewHolder> friendsRecyclerViewAdapter = new FirebaseRecyclerAdapter<Help, HelpViewHolder>(
Help.class,
R.layout.help_single_layout,
HelpViewHolder.class,
mUsersDatabase) {
#Override
protected void populateViewHolder(final HelpViewHolder helpViewHolder, Help help, int i) {
helpViewHolder.setDate(help.getDate());
final String list_user_id = getRef(i).getKey();
mUsersDatabase.child(list_user_id).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
final String userName = dataSnapshot.child("name").getValue().toString();
String blood = dataSnapshot.child("blood_group").getValue().toString();
final String phone = dataSnapshot.child("mobile").getValue().toString();
final String email = dataSnapshot.child("email").getValue().toString();
String address = dataSnapshot.child("place").getValue().toString();
helpViewHolder.setName(userName);
helpViewHolder.setBlood(blood);
helpViewHolder.setAddress(address);
helpViewHolder.setPhone(phone);
helpViewHolder.setEmail(email);
helpViewHolder.mView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
CharSequence options[] = new CharSequence[]{"Email", "Call"};
final AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle("Select Options");
builder.setItems(options, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
//Click Event for each item.
if (i == 0) {
}
if (i == 1) {
String uri = phone;
if (ActivityCompat.checkSelfPermission(getActivity(), android.Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
}
}
}
});
builder.show();
}
});
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
};
mHelpList.setAdapter(friendsRecyclerViewAdapter);
}
// viewholder class..
public static class HelpViewHolder extends RecyclerView.ViewHolder {
View mView;
public HelpViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setBlood(String blood){
TextView userStatusView = (TextView) mView.findViewById(R.id.help_blood);
userStatusView.setText(blood.toUpperCase());
}
public void setName(String name){
TextView userNameView = (TextView) mView.findViewById(R.id.help_name);
userNameView.setText(name.toUpperCase());
}
public void setPhone(String phone){
TextView userNameView = (TextView) mView.findViewById(R.id.help_mobile);
userNameView.setText(phone);
}
public void setEmail(String name){
TextView userNameView = (TextView) mView.findViewById(R.id.help_email);
userNameView.setText(name.toUpperCase());
}
public void setAddress(String address) {
TextView userNameView = (TextView) mView.findViewById(R.id.help_place);
address.toUpperCase();
userNameView.setText(address.toUpperCase());
}
public void setDate(String date){
}
}
}
Any help is well appreciated
Thanks in advance.

Add delete button in your help_single_layout . And add a new key posted in firebase database to check whether this user posted or not . On that basis , you can define visibiltiy of Delete button.

How to retrieve sorted data from Firebase and display it in text views? (Java)

I'm trying to collect data from FireBase, in Android Studio, while sorting it using the orderByChild and equalTo functions. Then I'm trying to display the data on text views. The page crashes every time. How can I fix this? Below I've given my code and my database:
public class TrackOrder extends AppCompatActivity {
DatabaseReference mDatabase;
private EditText trackText;
private Button trackBtn;
private TextView disp, text;
public void trackBtn (View view){ //opens the admin portal activity
trackText = (EditText) findViewById(R.id.trackText);
disp = (TextView) findViewById(R.id.disp);
String trackNumb = trackText.getText().toString();
disp.setText(trackNumb);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_track_order);
String numb = disp.getText().toString();
trackText = (EditText) findViewById(R.id.trackText);
text = (TextView) findViewById(R.id.text);
trackBtn = (Button) findViewById(R.id.trackBtn);
mDatabase = FirebaseDatabase.getInstance().getReference().child("Orders"); //Reflecting where the data will be located
mDatabase.orderByChild("1 order_number").equalTo("4725");
mDatabase.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
String name = dataSnapshot.getValue().toString();
text.setText(name);
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}